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zeng1234 · 2024年12月22日

b选项

NO.PZ2022090602000053

问题如下:

Tom Gayle, Moynahan’s superior, stops by Moynahan’s office. Moynahan shares his presentation with Gayle, who suggests that page 4 include a discussion about expected returns. They decide to outline an example of a recent bond trade where they bought a $100 par value bond at a premium. Moynahan presents a decomposition of the bond’s expected returns detailing various components and focuses on roll down return. He adds the following footnote: “The roll down return demonstrates how the price of a bond typically moves closer to par regardless of yield curve changes over the strategy horizon.”

Is the footnote Moynahan includes on page 4 most likely correct?

选项:

A.

Yes.

B.

No, with respect to bond prices.

C.

No, with respect to roll down return.

Solution

解释:

C is correct. The footnote Moynahan includes on page 4 is incorrect with respect to roll down return. The roll down return is equal to the bond’s percentage price change assuming an unchanged yield curve over the strategy horizon. The roll down return results from the bond “rolling down” the yield curve as the time to maturity decreases. As time passes, a bond’s price typically moves closer to par.

A is incorrect. Moynahan’s footnote regarding the yield curve is not accurate.

B is incorrect. Moynahan’s footnote with respect to bond prices is accurate.

请问一下b选项描述的bond price指的是文中的哪句话 好像没看到描述bond price的


1 个答案

发亮_品职助教 · 2024年12月24日

这道题关注下面这句就可以了:

The roll-down return demonstrates how the price of a bond typically moves closer to par regardless of yield curve changes over the strategy horizon.


这句说,roll down return展示了,在投资期内,无论利率是如何改变的,债券价格回归面值(moves closer to par)的现象。


选项B所说的Bond price就是指这个价格向面值回归的这句话。


需要注意的是,这句话不是roll down return

roll down return强调的是,在利率曲线稳定不变stable时,期初是长期债券,对应较高的长期折现率,期末债券变成短期债券,对应较低的短期折现率。这种折现率的降低,会带来期末更高的债券价格。这个价差收益(price appreciation)就是roll down return的收益。

这里有个关键是利率曲线stable稳定不变。而且,这个收益并非是债券的价格回归面值。


而原题的描述是:regardless of yield curve changes,他的意思是,不管利率曲线咋变,无论他是否改变,对应的收益是roll down return。

这个显然不对,因为roll down strategy的前提条件都出问题了,前提条件是yield curve stable稳定不变。

只有在yield curve stable时,债券的期限逐渐变短,在同一条利率曲线上导致对标的折现率改变(由长期折现率变成短期折现率),于是有债券价格差,对应这个价格差就是roll down return。